nigrosin (countable and uncountable, plural nigrosins)
A mixture of synthetic black dyes made by heating a mixture of nitrobenzene, aniline and aniline hydrochloride in the presence of a copper or iron catalyst; used for staining of bacteria and as a colorant.
• ironings, rosining
Source: Wiktionary
6 March 2025
(noun) the two innermost layers of the meninges; cerebrospinal fluid circulates between these innermost layers
Coffee dates back to the 9th century. Goat herders in Ethiopia noticed their goats seem to be “dancing” after eating berries from a particular shrub. They reported it to the local monastery, and a monk made a drink out of it. The monk found out he felt energized and kept him awake at night. That’s how the first coffee drink was born.
